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ATmega640
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64KB self-programming Flash Program Memory, 8KB SRAM, 4KB EEPROM, 16 Channel 10-bit A/D-converter. JTAG interface for on-chip-debug. Up to 16 MIPS throughput at 16 MHz. 1.8 - 5.5 Volt Operation.

128KB/64-pin version: ATmega1281
128KB/100-pin version: ATmega1280
256KB/64-pin version: ATmega2561
256KB/100-pin version: ATmega2560
Flash (Kbytes) 64
EEPROM (Kbytes) 4
SRAM (Bytes) 8192
Max I/O Pins 86
F.max (MHz) 16
Vcc (V) 1.8-5.5
   TQFP 100
 CBGA 100
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ATmega640/1280/1281/2560/2561 Preliminary Summary (37 pages, revision L, updated 08/07)
ATmega640/1280/1281/2560/2561 Preliminary (448 pages, revision L, updated 08/07)
 
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AVR200: Multiply and Divide Routines (21 pages, revision D, updated 5/06)
This Application Note lists subroutines for multiplication and division of 8 and 16-bit signed and unsigned numbers.
AVR202: 16-Bit Arithmetics on tinyAVR and megaAVR devices (3 pages, revision B, updated 5/02)
This Application Note lists program examples for arithmetic operation on 16-bit values on tinyAVR and megaAVR devices.
AVR204: BCD Arithmetics (14 pages, revision B, updated 01/03)
This Application Note lists routines for BCD arithmetics.
AVR220: Bubble Sort (5 pages, revision B, updated 5/02)
This Application Note implements the Bubble Sort algorithm on the AVR controllers.
AVR221: Discrete PID controller on tinyAVR and megaAVR devices (10 pages, revision A, updated 05/06)
This application note describes a simple implementation of a discrete Proportional-Integral-Derivative (PID) controller on tinyAVR and megaAVR devices.
AVR222: 8-Point Moving Average Filter on tinyAVR and megaAVR devices (5 pages, revision B, updated 5/02)
This Application Note gives an demonstration of how the addressing modes in the tinyAVR and megaAVR architecture can be utlized.
  Other Related Application Notes
  
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Debugger: AVR Dragon
AVR JTAGICE mkII
AVR ONE!
Design Software: AVR Studio 4
QTouch Library 3.2
QTouch Studio 3.1.0
Emulator: Mature ATICE50
Mature: Mature AVR ISP In-System Programmer
Programmer: AVRISP mkII In-System Programmer
Starter Kit: STK500
STK503
STK600
STK600-TQFP100
Software Files: AVR IBIS - Mega files
Zip archive with IBIS files for Atmel AVR Mega devices.
AVRSVF
AVRsvf is a commandline software that is used to generate Serial Vector Format (SVF) files with complete programming algorithms and content for all Atmel AVR devices with a JTAG interface. SVF files are used as input to most common JTAG programmers or ATE testers.
Register to download QTouch Library
 
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AVR Dragon
AVR JTAGICE mkII
See more FAQs
  
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8-bit Microcontroller Drives Battery-powered Thermostat (Article, 2 pages, updated 1/04)
Algorithm Builder for AVR (Article, 2 pages, updated 1/04)
Atmel AVR-based Constant Current Supply (Article, 4 pages, updated 1/04)
AVR and AVR32 - Quick Reference Guide (Overview, 68 pages, revision I, updated 5/09)
Introduction of the product range of AVR and AVR32 microcontrollers and application processors:
  • Device family description
  • Key features
  • Device selection guides
  • Application oriented device families
  • Tools offer
AVR Instruction Set (Other, 155 pages, revision H, updated 7/09)
Heterogeneous Device Networking (Article, 2 pages, updated 1/04)
High-level Tool Targeted for AVR Controllers (Article, 2 pages, updated 1/04)